Abstract:

According to the characteristics of cashmere fabric, a discharge printing process is suggested which has good applicability, even and full ground color, and high color fastness. Selection of dyestuffs and auxiliaries for discharge printing of cashmere fabrics was discussed, and the influence of amount of discharging agent amount on the discharged whiteness and the K/S value of the fabric as well as the influence of temperature on the build-up of dyes and dischargeability were studied. The results demonstrated that acidic dye Duolilan and discharging agent Langqielie C and BR-1（compound）were suitable for the ground shade in discharge printing, and the dosages of both dyes and discharge agent were in the range of 11%~13%. The K/S value of Lanasyn S dyed ground shade increased with the increase of dosage of Langqielie C and BR-1. Acidic dye Duolilan exhibited good build-up property when dyeing was carried at 85-95℃ and the discharged whiteness of fabrics was affected by temperature.